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Finding the Fourth Proportional to 153,901.88, 211,910.86 and 131,189.96

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Solution

The fourth proportional to 153,901.88, 211,910.86 and 131,189.96 is: 180,638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,901.88 : 211,910.86 = 131,189.96 : x
  2. Step 2: Convert to fraction form
    153,901.88/211,910.86 = 131,189.96/x
  3. Step 3: Cross multiply
    153,901.88x = 211,910.86 × 131,189.96
  4. Step 4: Simplify right side
    153,901.88x = 27,800,577,246.97
  5. Step 5: Solve for x
    x = 27,800,577,246.97/153,901.88
  6. Step 6: Final answer
    x = 180,638.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.